When do we celebrate Independence Day in the United States?

Independence Day in the United States is celebrated on July 4th. This date commemorates the adoption of the Declaration of Independence in 1776, when the thirteen American colonies declared their freedom from British rule. The choice of July 4th has become a significant symbol of American liberty and is marked by various celebrations, including fireworks, parades, and barbecues across the nation.

The other dates listed—July 1st, August 4th, and September 11th—do not hold the same historical significance as July 4th in the context of America's independence. July 1st and August 4th do not relate directly to major milestones in American history. September 11th, while a significant date for other reasons (notably the terrorist attacks in 2001), does not pertain to the celebration of Independence Day. Hence, July 4th is the correct answer as it is specifically recognized and celebrated annually as a cornerstone of American history and freedom.